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+<!doctype html public "-//W3C//DTD HTML 4.01 Transitional//EN"
+ "http://www.w3.org/TR/html4/loose.dtd">
+<html> <head>
+<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
+<title> Postfix manual - generic(5) </title>
+</head> <body> <pre>
+GENERIC(5) GENERIC(5)
+
+<b>NAME</b>
+ generic - Postfix generic table format
+
+<b>SYNOPSIS</b>
+ <b>postmap /etc/postfix/generic</b>
+
+ <b>postmap -q "</b><i>string</i><b>" /etc/postfix/generic</b>
+
+ <b>postmap -q - /etc/postfix/generic</b> &lt;<i>inputfile</i>
+
+<b>DESCRIPTION</b>
+ The optional <a href="generic.5.html"><b>generic</b>(5)</a> table specifies an address mapping that applies
+ when mail is delivered. This is the opposite of <a href="canonical.5.html"><b>canonical</b>(5)</a> mapping,
+ which applies when mail is received.
+
+ Typically, one would use the <a href="generic.5.html"><b>generic</b>(5)</a> table on a system that does not
+ have a valid Internet domain name and that uses something like <i>localdo-</i>
+ <i>main.local</i> instead. The <a href="generic.5.html"><b>generic</b>(5)</a> table is then used by the <a href="smtp.8.html"><b>smtp</b>(8)</a>
+ client to transform local mail addresses into valid Internet mail
+ addresses when mail has to be sent across the Internet. See the EXAM-
+ PLE section at the end of this document.
+
+ The <a href="generic.5.html"><b>generic</b>(5)</a> mapping affects both message header addresses (i.e.
+ addresses that appear inside messages) and message envelope addresses
+ (for example, the addresses that are used in SMTP protocol commands).
+
+ Normally, the <a href="generic.5.html"><b>generic</b>(5)</a> table is specified as a text file that serves
+ as input to the <a href="postmap.1.html"><b>postmap</b>(1)</a> command. The result, an indexed file in <b>dbm</b>
+ or <b>db</b> format, is used for fast searching by the mail system. Execute
+ the command "<b>postmap /etc/postfix/generic</b>" to rebuild an indexed file
+ after changing the corresponding text file.
+
+ When the table is provided via other means such as NIS, LDAP or SQL,
+ the same lookups are done as for ordinary indexed files.
+
+ Alternatively, the table can be provided as a regular-expression map
+ where patterns are given as regular expressions, or lookups can be
+ directed to TCP-based server. In those case, the lookups are done in a
+ slightly different way as described below under "REGULAR EXPRESSION
+ TABLES" or "TCP-BASED TABLES".
+
+<b>CASE FOLDING</b>
+ The search string is folded to lowercase before database lookup. As of
+ Postfix 2.3, the search string is not case folded with database types
+ such as <a href="regexp_table.5.html">regexp</a>: or <a href="pcre_table.5.html">pcre</a>: whose lookup fields can match both upper and
+ lower case.
+
+<b>TABLE FORMAT</b>
+ The input format for the <a href="postmap.1.html"><b>postmap</b>(1)</a> command is as follows:
+
+ <i>pattern result</i>
+ When <i>pattern</i> matches a mail address, replace it by the corre-
+ sponding <i>result</i>.
+
+ blank lines and comments
+ Empty lines and whitespace-only lines are ignored, as are lines
+ whose first non-whitespace character is a `#'.
+
+ multi-line text
+ A logical line starts with non-whitespace text. A line that
+ starts with whitespace continues a logical line.
+
+<b>TABLE SEARCH ORDER</b>
+ With lookups from indexed files such as DB or DBM, or from networked
+ tables such as NIS, LDAP or SQL, each <i>user</i>@<i>domain</i> query produces a
+ sequence of query patterns as described below.
+
+ Each query pattern is sent to each specified lookup table before trying
+ the next query pattern, until a match is found.
+
+ <i>user</i>@<i>domain address</i>
+ Replace <i>user</i>@<i>domain</i> by <i>address</i>. This form has the highest prece-
+ dence.
+
+ <i>user address</i>
+ Replace <i>user</i>@<i>site</i> by <i>address</i> when <i>site</i> is equal to $<b><a href="postconf.5.html#myorigin">myorigin</a></b>,
+ when <i>site</i> is listed in $<b><a href="postconf.5.html#mydestination">mydestination</a></b>, or when it is listed in
+ $<b><a href="postconf.5.html#inet_interfaces">inet_interfaces</a></b> or $<b><a href="postconf.5.html#proxy_interfaces">proxy_interfaces</a></b>.
+
+ @<i>domain address</i>
+ Replace other addresses in <i>domain</i> by <i>address</i>. This form has the
+ lowest precedence.
+
+<b>RESULT ADDRESS REWRITING</b>
+ The lookup result is subject to address rewriting:
+
+ <b>o</b> When the result has the form @<i>otherdomain</i>, the result becomes
+ the same <i>user</i> in <i>otherdomain</i>.
+
+ <b>o</b> When "<b><a href="postconf.5.html#append_at_myorigin">append_at_myorigin</a>=yes</b>", append "<b>@$<a href="postconf.5.html#myorigin">myorigin</a></b>" to addresses
+ without "@domain".
+
+ <b>o</b> When "<b><a href="postconf.5.html#append_dot_mydomain">append_dot_mydomain</a>=yes</b>", append "<b>.$<a href="postconf.5.html#mydomain">mydomain</a></b>" to addresses
+ without ".domain".
+
+<b>ADDRESS EXTENSION</b>
+ When a mail address localpart contains the optional recipient delimiter
+ (e.g., <i>user+foo</i>@<i>domain</i>), the lookup order becomes: <i>user+foo</i>@<i>domain</i>,
+ <i>user</i>@<i>domain</i>, <i>user+foo</i>, <i>user</i>, and @<i>domain</i>.
+
+ The <b><a href="postconf.5.html#propagate_unmatched_extensions">propagate_unmatched_extensions</a></b> parameter controls whether an
+ unmatched address extension (<i>+foo</i>) is propagated to the result of table
+ lookup.
+
+<b>REGULAR EXPRESSION TABLES</b>
+ This section describes how the table lookups change when the table is
+ given in the form of regular expressions. For a description of regular
+ expression lookup table syntax, see <a href="regexp_table.5.html"><b>regexp_table</b>(5)</a> or <a href="pcre_table.5.html"><b>pcre_table</b>(5)</a>.
+
+ Each pattern is a regular expression that is applied to the entire
+ address being looked up. Thus, <i>user@domain</i> mail addresses are not bro-
+ ken up into their <i>user</i> and <i>@domain</i> constituent parts, nor is <i>user+foo</i>
+ broken up into <i>user</i> and <i>foo</i>.
+
+ Patterns are applied in the order as specified in the table, until a
+ pattern is found that matches the search string.
+
+ Results are the same as with indexed file lookups, with the additional
+ feature that parenthesized substrings from the pattern can be interpo-
+ lated as <b>$1</b>, <b>$2</b> and so on.
+
+<b>TCP-BASED TABLES</b>
+ This section describes how the table lookups change when lookups are
+ directed to a TCP-based server. For a description of the TCP
+ client/server lookup protocol, see <a href="tcp_table.5.html"><b>tcp_table</b>(5)</a>. This feature is not
+ available up to and including Postfix version 2.4.
+
+ Each lookup operation uses the entire address once. Thus, <i>user@domain</i>
+ mail addresses are not broken up into their <i>user</i> and <i>@domain</i> con-
+ stituent parts, nor is <i>user+foo</i> broken up into <i>user</i> and <i>foo</i>.
+
+ Results are the same as with indexed file lookups.
+
+<b>EXAMPLE</b>
+ The following shows a generic mapping with an indexed file. When mail
+ is sent to a remote host via SMTP, this replaces <i>his@localdomain.local</i>
+ by his ISP mail address, replaces <i>her@localdomain.local</i> by her ISP mail
+ address, and replaces other local addresses by his ISP account, with an
+ address extension of <i>+local</i> (this example assumes that the ISP supports
+ "+" style address extensions).
+
+ /etc/postfix/<a href="postconf.5.html">main.cf</a>:
+ <a href="postconf.5.html#smtp_generic_maps">smtp_generic_maps</a> = <a href="DATABASE_README.html#types">hash</a>:/etc/postfix/generic
+
+ /etc/postfix/generic:
+ his@localdomain.local hisaccount@hisisp.example
+ her@localdomain.local heraccount@herisp.example
+ @localdomain.local hisaccount+local@hisisp.example
+
+ Execute the command "<b>postmap /etc/postfix/generic</b>" whenever the table
+ is changed. Instead of <b>hash</b>, some systems use <b>dbm</b> database files. To
+ find out what tables your system supports use the command "<b>postconf</b>
+ <b>-m</b>".
+
+<b>BUGS</b>
+ The table format does not understand quoting conventions.
+
+<b>CONFIGURATION PARAMETERS</b>
+ The following <a href="postconf.5.html"><b>main.cf</b></a> parameters are especially relevant. The text
+ below provides only a parameter summary. See <a href="postconf.5.html"><b>postconf</b>(5)</a> for more
+ details including examples.
+
+ <b><a href="postconf.5.html#smtp_generic_maps">smtp_generic_maps</a></b>
+ Address mapping lookup table for envelope and header sender and
+ recipient addresses while delivering mail via SMTP.
+
+ <b><a href="postconf.5.html#propagate_unmatched_extensions">propagate_unmatched_extensions</a></b>
+ A list of address rewriting or forwarding mechanisms that propa-
+ gate an address extension from the original address to the
+ result. Specify zero or more of <b>canonical</b>, <b>virtual</b>, <b>alias</b>, <b>for-</b>
+ <b>ward</b>, <b>include</b>, or <b>generic</b>.
+
+ Other parameters of interest:
+
+ <b><a href="postconf.5.html#inet_interfaces">inet_interfaces</a></b>
+ The network interface addresses that this system receives mail
+ on. You need to stop and start Postfix when this parameter
+ changes.
+
+ <b><a href="postconf.5.html#proxy_interfaces">proxy_interfaces</a></b>
+ Other interfaces that this machine receives mail on by way of a
+ proxy agent or network address translator.
+
+ <b><a href="postconf.5.html#mydestination">mydestination</a></b>
+ List of domains that this mail system considers local.
+
+ <b><a href="postconf.5.html#myorigin">myorigin</a></b>
+ The domain that is appended to locally-posted mail.
+
+ <b><a href="postconf.5.html#owner_request_special">owner_request_special</a></b>
+ Give special treatment to <b>owner-</b><i>xxx</i> and <i>xxx</i><b>-request</b> addresses.
+
+<b>SEE ALSO</b>
+ <a href="postmap.1.html">postmap(1)</a>, Postfix lookup table manager
+ <a href="postconf.5.html">postconf(5)</a>, configuration parameters
+ <a href="smtp.8.html">smtp(8)</a>, Postfix SMTP client
+
+<b>README FILES</b>
+ <a href="ADDRESS_REWRITING_README.html">ADDRESS_REWRITING_README</a>, address rewriting guide
+ <a href="DATABASE_README.html">DATABASE_README</a>, Postfix lookup table overview
+ <a href="STANDARD_CONFIGURATION_README.html">STANDARD_CONFIGURATION_README</a>, configuration examples
+
+<b>LICENSE</b>
+ The Secure Mailer license must be distributed with this software.
+
+<b>HISTORY</b>
+ A genericstable feature appears in the Sendmail MTA.
+
+ This feature is available in Postfix 2.2 and later.
+
+<b>AUTHOR(S)</b>
+ Wietse Venema
+ IBM T.J. Watson Research
+ P.O. Box 704
+ Yorktown Heights, NY 10598, USA
+
+ Wietse Venema
+ Google, Inc.
+ 111 8th Avenue
+ New York, NY 10011, USA
+
+ GENERIC(5)
+</pre> </body> </html>